HP LaserJet P4015dn printing issue

I'm having an issue with my P4015dn where documents print with a significant delay. Sometimes they will come out instantly, other times they will come out 5-30 minutes later. I've tried reinstalling print drivers, trying different printer configuration settings, clearing files in the \system32\spool\printers directory, restarting the print spooler, all to no avail. The printer is connected over the network and is not shared. I've also tried switching out the ethernet cable. There don't seem to be any issues with the network (i.e slowdowns). I've tested the port it's connected to and that also seems fine. Does anyone have any ideas as to what might be causing this and how I can fix it? Thanks in advance

Other types of documents are delayed as well, not just PDF's. I suspect it has something to do with the spooler, seeing as deleting jobs also takes a long time. The problem is that this problem affects many users, not just one.

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